Txiki Begiristain, City’s director of football, said: “We are pleased to welcome Douglas. He is an exciting player with great potential, and everyone here is looking forward to helping him develop his talent and progress in the game.”

The club will make a further statement in the coming days on whether Luiz will join the first team squad or be sent out on loan.

Pep Guardiola’s side begin their pre-season fixtures against Manchester United on Thursday in Houston, Texas.